Thread: Control-C, etc
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Old 6th Jun 2021, 3:54 am   #12
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 4,297
Default Re: Control-C, etc

Ctrl-Alt-Del is picked up by the ROM BIOS keyboard driver of the very first PC (IBM 5150) and effectively causes a reset (look at the routine at address EA71 in the BIOS listing of the PC Techref on bitsavers, page 367 of the .pdf).

Since the 'Alt' key was not common on microcomputers before the 5150, I am pretty sure that was the first machine to use Ctrl-Alt-Del.
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